A factory reset sometimes reverts the printer to a state where it may ignore certain cartridge locks, though it may not change the actual firmware version. CompAndSave On the control panel, go to Restore Factory Defaults and confirm by clicking
: Ensure there are no pending print jobs in your computer's print queue. CompAndSave Step 2: Download Older Firmware
Find the target firmware
Once the downgrade succeeds, you must stop the printer from automatically updating itself again.
The HP OfficeJet Pro 8620 originally shipped firmware versions prior to that allowed any ink cartridge. Over time, HP introduced “Dynamic Security” – a feature that remotely blocks cartridges using a non-HP chip. hp officejet pro 8620 firmware downgrade new
how to perform hard reset for HP Officejet Pro 8620 - 6262280
"HP just killed your cheap cartridges, but here is the new exploit. Forget the menu—it’s locked. Look at the bootloader. If you hold # + 3 while plugging in, you get a raw recovery mode that HP forgot to disable. This bypasses the web server security completely." A factory reset sometimes reverts the printer to
While HP has officially locked down the ability to perform a the dedication of the third-party printing community ensures that methods and files are always floating just below the surface. Whether using a USB recovery method, a GitHub script, or a file from a Google Drive repository, the path is fraught with technical risks.
Download the older firmware version (often referred to as "previous version" or "pre-2023 version" in forums). Step 2: Configure Printer Settings for Downgrade The HP OfficeJet Pro 8620 originally shipped firmware
firmware—typically to bypass errors—you must manually install an older version (like 1640A or 1910A) because HP does not officially support rollbacks. Quick Checklist Before Starting
If you approach HP Support for a solution, the response is almost universally negative. A review of a support request from May 2025 shows an HP Agent bluntly stating, "After reviewing your case, I regret to inform you that downgrading the firmware on the HP OfficeJet Pro 8620 is not possible". Typically, the only advice from the manufacturer is to purchase genuine HP cartridges or to reset the printer, which does not roll back the firmware.